package student;

/**
 * @author Administrator
 */
public class RenleiTest {
    public static void main(String[] args) {
        Renlei renlei=new Renlei();
        renlei.ren();
        Student student=new Student();
        student.ren();
        Teacher teacher=new Teacher();
        teacher.ren();
        Student stu=(Student) student;
        stu.add();
    }
}
